arm64: defconfig: Switch to PL11x DRM driver

This switches out the old fbdev PL11x driver to the new
DRM driver in the Aarch64/ARM64 defconfig. Some ARM
reference designs use this IP with the Silicon Image
SII902x HDMI bridge so activate both.

The required DTS changes are already in-tree.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm64/configs/defconfig

@@ -485,13 +485,16 @@ CONFIG_DRM_SUN8I_DW_HDMI=m
 CONFIG_DRM_SUN8I_MIXER=m
 CONFIG_DRM_TEGRA=m
 CONFIG_DRM_PANEL_SIMPLE=m
+CONFIG_DRM_SII902X=m
 CONFIG_DRM_I2C_ADV7511=m
 CONFIG_DRM_VC4=m
 CONFIG_DRM_HISI_HIBMC=m
 CONFIG_DRM_HISI_KIRIN=m
 CONFIG_DRM_MESON=m
+CONFIG_DRM_PL111=m
 CONFIG_FB=y
-CONFIG_FB_ARMCLCD=y
+CONFIG_FB_MODE_HELPERS=y
+CONFIG_BACKLIGHT_CLASS_DEVICE=y
 CONFIG_BACKLIGHT_GENERIC=m
 CONFIG_BACKLIGHT_PWM=m
 CONFIG_BACKLIGHT_LP855X=m